Process for producing metal phthalocyanine pigment

Details Process for producing metal phthalocyanine pigment Process for producing metal phthalocyanine pigment

1993-04-30

1994-06-07

Group, Karl

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106412, 106413, 540122, 540139, 540142, 540144, C09B 6750

Patent

active

053186230

ABSTRACT:
A process for producing a metal phthalocyanine pigment which comprises the steps of: reacting phthalic anhydride or a derivative thereof with urea or a derivative thereof with heating in the presence of a catalyst either in the presence or absence of an organic solvent; adding to the reaction mixture of the preceding step a metal or its compound capable of constituting the core of the metal phthalocyanine either alone or together with urea or a derivative thereof, without isolating the reaction product from the reaction mixture of the preceding step; and allowing the reaction mixture to react while simultaneously applying a mechanical grinding force in the presence or absence of a grinding agent.

REFERENCES:
patent: 2602800 (1952-07-01), Barnhart
patent: 3028392 (1962-04-01), Dudnikov
patent: 4294620 (1981-10-01), Sappok et al.

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